Sewing



Nov. a, 19254.-l .1,559,840

F.BAKER SEWINCy orignm'rned- Jan. 17, 192s 2 sheets-sneu 1 Nov. 3, 1925. 1,559,840

. y .FVBAKER SEWING Original Filed Jan. 17, 1923 2 Sl'xee'cs--Shee'I 2 Patented Nov. 3, 1925.

UNITED STATES PATE-NT FEEDEEIGK BAKER, or BLACKH'EATH, Lennon, ENGLAND, Assren'on l'ro'v s IjNjGLE THREAD LocKsTircrrir/rncrrnnsLIMITED,ernennen, ENGLAND; ACOM'PANY or GREAT BRITAIN.

n SEWING. Original application filed January 1'7, 1923; Serial No. 613,223. Divdedand thisfappl'ication filed January 25,1924'. Serial No. 688,571.

To all whom t may concern.:

Be it known that I, FREDERICK BAKER, a subject of-theKing-.of Great Britain, residing at 42 Lee Road, Blackheath, London, Englanchhave invented new and useful lmprovements in and Relating to Sewing, of which the 'followingis a specification..

This invention relates to sewing and has forit-s chief object'to provide a novel method of manipulating athread whereby novel forms'ofsingle thread locked stitching can be produced. Novel mechanism rfor this purpose is described in .my co-pending application Serial No. 613,223, filedv January 17th, 1923, of which this is a' divisional application. 1

According to the present invention I produce single thread stitching whichv cannot be unravelled and is stronger than the ordinary double thread lock stitch with agiven size of thread.

The novel stitchcan-befformedV in various ways, but in all cases the loop formed from 'the needle is formed into two loops, a small or permanent loop and alarga-loop, thelarge or temporary loop being` twisted'and passed (i. e., noosed) over thesmall loop and l being theni drawn vtight .roundvit and -so tiedto itV close under or within thewo'rlr. VIn the' preferred constructionhereinafter described thisl'tying of the small loop isthus completed before the needle neXt piercesthe material being se'wn. Further features of importance in the preferred method of forming my novel stitching reside inthe fact thatn auportion of .onef of*v the l strands-of each needle .loopf ijs diverted and retained while the remainder of the'lloop is drawn outtwisted andv made t'o encircle the retained portion in such a manner that on the completion of the stitch 'the said re'- tained portion/becomes a ylocked looprthe length-of which has been automatically, determined by the 'feed ormovement ofthe materialbeing sewn. This 'loop is in fact the smaller ofk the two,` loops into which each needle loop is formed as above stated.

In the preferred method of forming the stitches the above mentioned diverted and retained strand of the needle loop involved in the second and all subsequent stitches of a line of sewing is carried through the pre- Vious loop and thereby itself becomes a loop extending through the bight of the said previous loop.

A feature of .the stitching in itsv preferred and linished form resides vin the fact that kthe strands of the loops'constituting the'line of sewing on the underside of the material are twisted bodily around one another thereby bringing them very closely in con- Y render the same more clear and readily understood. A

Figuresl to ..6 illustrate diagrammatically various stages*r in the manipulation ofthe thread for producing sewing in accordance withf myinvention. n

lFigures' 7 and S-illustrate in plan view on the underside of .the material v:and in perspecti-ve. the resultant .seam,.magnified distorted andloosened'for convenience of illustration.

Figures-9, l0, 1l and .12 represent modiiied manipulation of the thread .in accordance with the invention.

Referring'iirst to .themanipulation of the thread in accordance with l*"ig`ures .lv to Git is seenby reference to these ligures that as a needle threadjloop A consisting of strands al andV a2 isbeingdrawn out below the needleplate as shown in VFigure l the strand all is formed `with. a twist or incipient loop. B vas shown in Figure 2 and as the loop A continues to be `drawn out it is'twisted 'so that the ,position of, the back and front strands is reversed as shown in Figure 3 and meanwhile the loop B is drawnback through the bight of a loop C. At this stage the usual feed mechanism of the machine operates and the material and thread shift to the left as shown'in Figure 4. As the loop A is drawn up it is passed (i. e., noosed) over the loop B as shown in Figure 5 and the tightening of the thread by the usual take-up mechanism causes the actual bight or bend of the loop A to slip around the strands of The actual forms Vzig'ainst the material between the penetra'- tions. Y

Although as hereinbetore stated my novel 'form of stitching in all cases involves the formation orp a small loop and a lar'ge loop -from a single needle loop and the passing ot the temporary large loop vover the small permanent loop and draai-'ing it up thereon, the actual formation and manipulation ot these loops may be eiiected in various ways. f

For example it the mechanism employed a strand ot the needle thread at a point above the bight oit the retained loop penetrated by the needle the subsequent formation or the loops is as shown at two stages diagrammatically in Figures 9 and l0. It on the other hand the mechanism engages a strand ot' the needle thread at a point below the bight of the retained loop the subsequent formation of the loop is as shewn at two stages diagrammatically in Figures ll and l2.

of the completed stitches in these instances differ slightly but the more general characteristics already referred to are common to all.

1What I claim is l. A method of forming a single thread locked stitch consisting in drawing a single loop through each needle penetration of the material being sewn, dividing each such loop drawn from the needle into two loops, a permanent loop and a temporary loop, twisting the temporary loop and passing it completely over the permanent loop in drawing upY the said temporary loop to the material being sewn.

2. A method of forming a single thread locked stitch consisting in dividing each loop drawn from the needle into two loops, a permanent loop and a temporary loop, twisting the temporary loop, drawing the permanent loop through the bight of the permanent loop of the preceding stitching cycle, and passing the temporary twisted loop completely over the permanent loop indrawing up the temporary loop to the material being sewn.

3. A method of forming a single thread locked stitch consisting in diverting a portion ot one oit' the strands ot each loop drawn from the needle and retaining it while the remainder of the loop is twisted, made to encircle the retained portion and drawn up by the take-up luntil it becomes locked to thesaid retained portion at the end remote from the bight of the latter whereby the latter becomes a locked loop of definite length.

il. A method of forming a single thread locked stitch consisting in diverting a portion ot one of the strands of each loop rdrawn 'trom the needle drawing said di- `v'erted portion through the bight of the previously diverted portion ot the loop of the preceding stitching cycle, and retaining it whilethe remainder of the loop is'twisted and made to encircle the retained portion and drawn up by the take-up until it becomes locked to the said retained portion at the end remote from the bight of the latter whereby the latter becomes a locked loop of definite length.

5. A method of forming a single thread locked stitch consisting in drawing out a loop of thread from the needle, diverting a portion of one oit the strands of said loop and retaining it, twisting another portion of the loop and drawing it up to the ma terial around and over the retained strand portion.

6. A method of forming a single thread locked stitch consisting in drawing out a loop of thread :trom the needle, engaging a portion ot one of the strands and drawing it as a loop through the 1eight of the previously engaged portion ot the loop of the preceding-stitching cycle, twisting` the first mentioned loop and drawing it up around and over the retained strand portion.

7. A method or' forming a single thread locked stitch consisting in drawing a single loop through each needle penetration of the material being sewn, dividing each such loop into two loops, a permanent loop and a temporary loop, twisting and drawin0` the permanent Vloop through the bight o? the permanent loop or' the preceding stitching cycle, and twisting and passing the teinporary loop completely over the permanent loop in drawing up the temporary loop to the material. 1

FREDERICK BAKER. 

